<template>
  <div class="component-upload-image">
    <!-- name="multipartFile" -->
    <el-upload
      multiple
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      name="file"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="imageUpload"
      :on-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{ hide: this.fileList.length >= this.limit || disabled }"
      :disabled="disabled"
    >
      <i class="el-icon-plus"></i>
    </el-upload>
    <!-- <img style="width: 100px; height: 100px" :src="imgurl1" alt="" /> -->
    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>

    <el-dialog
      :visible.sync="dialogVisible"
      title="预览"
      width="800"
      append-to-body
    >
      <img
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import {
  loadingMsg, // 图片
  safeImg,
} from "@/api/manage/asset";

export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 5,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["png", "jpg", "jpeg"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true,
    },
    // 是否禁用
    disabled: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      imgurl1: "",
      number: 0,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      baseUrl: process.env.VUE_APP_BASE_API,
      // uploadImgUrl: process.env.VUE_APP_BASE_API + "/termite/upLoadPhoto", // 上传的图片服务器地址
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/termite/upload", // 上传的图片服务器地址
      headers: {
        "x-access-token": getToken(),
      },
      fileList: [],
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(",");
          // 然后将数组转为对象数组
          // this.fileList = list.map((item) => {
          //   if (typeof item === "string") {
          //     if (item.indexOf(this.baseUrl) === -1) {
          //       item = { name: this.baseUrl + item, url: this.baseUrl + item };
          //     } else {
          //       item = { name: item, url: item };
          //     }
          //   }
          //   return item;
          // });
          // 保存当前的 fileList，用于匹配已有的 blob URL
          const currentFileList = [...this.fileList];
          this.fileList = list.map((item) => {
            if (typeof item === "string") {
              // 检查当前 fileList 中是否已有对应的项（通过 originalUrl 匹配）
              // 如果有，保留其 blob URL 用于展示
              const existingItem = currentFileList.find(
                (f) => f.originalUrl === item || f.url === item,
              );
              if (existingItem && existingItem.url.startsWith("blob:")) {
                // 如果已有 blob URL，保留它用于展示，但更新 originalUrl
                return {
                  ...existingItem,
                  originalUrl: item,
                };
              }

              const isAbsolute =
                item.startsWith("http://") ||
                item.startsWith("https://") ||
                item.startsWith("blob:");
              if (!isAbsolute && item.indexOf(this.baseUrl) === -1) {
                item = { name: this.baseUrl + item, url: this.baseUrl + item };
              } else if (isAbsolute) {
                item = { name: item, url: item };
              } else {
                item = { name: item, url: item };
              }
            }
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true,
    },
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {
    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.$modal.msgError(
          `文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`,
        );
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传图片，请稍候...");
      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      console.log(res, file, "----");
      if (res.errorCode !== "000000") {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.errorMsg || "图片上传失败");
        this.$refs.imageUpload.handleRemove(file);
        this.uploadedSuccessfully();
        return;
      }

      const params = {
        filename: res.data,
      };
      safeImg(params)
        .then((blob) => {
          console.log(blob, "blob");

          if (!blob) {
            throw new Error("获取图片数据失败");
          }
          const blobData = blob instanceof Blob ? blob : new Blob([blob]);
          const objectUrl = URL.createObjectURL(blobData);
          this.imgurl1 = objectUrl;
          // url 用于展示（blob URL），originalUrl 用于提交给后台（原始路径）
          this.uploadList.push({
            name: file.name,
            url: objectUrl, // 用于展示的 blob URL
            originalUrl: res.data, // 用于提交给后台的原始路径
          });
          console.log(this.uploadList, " this.uploadList");
          this.uploadedSuccessfully();
        })
        .catch((error) => {
          console.error("获取图片地址失败", error);
          this.number--;
          this.$modal.closeLoading();
          this.$modal.msgError("获取图片地址失败，请稍后重试");
          this.$refs.imageUpload.handleRemove(file);
        });
    },
    // 删除图片
    handleDelete(file) {
      const findex = this.fileList.map((f) => f.name).indexOf(file.name);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
    },
    // 上传失败
    handleUploadError() {
      this.$modal.msgError("上传图片失败，请重试");
      this.$modal.closeLoading();
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        // 使用 $nextTick 确保 fileList 已更新，然后再触发 input 事件
        this.$nextTick(() => {
          this.$emit("input", this.listToString(this.fileList));
        });
        this.$modal.closeLoading();
      }
    },
    // 预览
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        // 优先使用 originalUrl（新上传的图片，提交给后台的原始路径）
        // 如果没有 originalUrl，则使用 url（已有图片）
        const urlToUse = list[i].originalUrl || list[i].url;
        if (urlToUse) {
          // 如果是 blob URL，说明是新上传的，必须使用 originalUrl
          if (urlToUse.startsWith("blob:")) {
            strs += (list[i].originalUrl || "") + separator;
          } else {
            // 普通 URL，移除 baseUrl 前缀（如果包含）
            strs += urlToUse.replace(this.baseUrl, "") + separator;
          }
        }
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
  },
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
</style>
